Rotary engine.



PATENTEDqMAY 5, 1903. N. H. MOTSIN'GER.

ROTARY ENGINE.

APPLICATION FILED DEG. 12 1!?01.

4 SHEETS;SIHBET 1.

H0 MODEL.

-No.726,969-. PATENTEDMAY 5,1903. N. H. MOTSINGER.

ROTARY ENGINE. v urmoumn mum no. 12, 1901-. no ngonsn. 4 sums-5112212;

THE NORRIS PETERs ca.. wAsl-nucrou, n. c

No. 726,969. PATENTED MAY 5, 1903.

N. H. MOTSINGER. ROTARY ENGINE.

APPLICATION FILED DBO. 12.1901.

30 MODEL. 4 slums-5mm a.

.No. 726,969. PATENTED MAY.5,1908r N. H. MOTSINGER.

ROTARY ENGINE.

APPLICATION TILED D30. 13. 1801.

4 SHEETS-SHEET 4.

WITNESSES w INVENTOR 7g W NeweH H LMotaingef '1: NORRIS FETEPS cm, wnsumamu. n. c.

' 11 is an elevation of the valve-plate 22.

UNITED STATES PATENT Patented May 5, 1903.

FFICE.

ROTARY ENGiNE.

s'rnornrcn'rron forming part or Letters Patent No. 726,969, dated May 5, 1903.

' Application filed December 12, 1201. Serial No. 85,676. (No model.)

To all whom it concern: Be it known thatI, NEWELL H. MOISINGER,

a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new-and useful Rotary Engine, of which the following is a specification.

- My invention relates to an improvement in that class of engines iii which the working parts are continuously rotary.

The object of myinvention is-to produce a;

5, 6, and 7'indicate a preferred contour forthe vane and groove. .Fig. 8 is a plan of a modified form for balancing the end thrust. Fig. 9 is an elevation of the left-hand endof Fig. 1 with the valve-plates removed. Fig. 10 is an elevation of the valve-plate 18. Fig. Fig. 12 is a view similar to Fig.- 9 with valveplate 18 in position thereon. Fig. 13 is a similarview of the opposite or right-hand end of Fig. 1. Fig. 14 is a view similar to. Fig. 12 with both of the valve-plates in position.

In the drawings, 10 and 11 indicate a pair of drums, either cylindrical or conical, the 'pe-' ripheries of which are in contact throughout their lengths. Carried by or; formed integral with the periphery of the drum 10 are vane which is in mesh with its oorresponding groove will practically fill the groove so as to close communication between the ends of the qgroove. Surrounding the two drums is a casing 12, in whichare formed two bardiaineter equal to the'external diameter of drumlO with its vanes, while the internal diameter of barrel 11" is equal to the exterrial-diameter of drum 11.: Each end of the 'casingisclosed by a suitable head 13, through each of whichis formed an inlet-port 14 and exhaust-port-15. Drums l0 and 11 are provided with'shafts 16.-and 17, respectively,

which extend through suitable hearings in the head-plates Suitable pulleys may be carried by either shaft.

Any suitable valve mechanism may be provided for controlling the entrance of the motive fluid into the engine; but in the drawings thedrum 11 serves to automatically open and close the ports. In order, however, toenable me to reverse the rotation of the drums and also to control the effective area of the inlet-ports, I pivot upon shaft 17 at each end just outside of the head 13 a plate 18, provided with an inlet-port 19 and exhaust-port 20, which ports are so arranged in the plate that when one is broughtopposite the co'rresponding port in head 13 the other will be out of communication with its corresponding port in thesame head. This plate is provided with a sleeve 21, which isjourn'aled upon shaft 17. plate 22, provided with a port23, which is adapted to behroughtinto register or par tial register with port 19 of plate 18. This plate is also provided with a sleeve 24,which is sleeved upon sleeve 21. described 'are inclosed in a steam-chest 25, secured. to the head 13, and provided with suitable inlet and exhaust connections 26 and 27, respectively. Secured to sleeves 21 and 24ers operating-handles 28 and29.,=resp'eco tively, by means of which the plates may be independentlyshifted.

There are several different contours which the vanes 10 and coacting grooves 11 may assume; but my present experience leads me 95 'riphery of drum 10, while 31 indicates the The two drums must no periphery of drum 11. rotate at the same angular velocity, and as the rotatio'n is accomplished by the interaction of vane 10 and-groove l1 and the two role 10 and 11", barrellO" being of internal 1 peripheries must remain in contact the radius Journaled upon this sleeve is a The valve-plates. 8 v

v of the periphery 30 is less than the pitch-radius,while the radius of the periphery 31 is an equal amount greater than the pitch-radius,

ters of the drums, while surface 33 extends from the point 35 to point 36 at the base of thevane and on the periphery 30. Surface 32 is a curve traced by the point 3etwhen thepitch-circle of drum 10 is rolled-upon the pitch-circle of drum 11, this curve being an inverted epicycloidal arc, and surface-33 is is shown in Fig. 6.-

a curve traced by the point 35 when the pitchcircle of the drum 11 is rolled upon the pitch-circle of drum 10, the point 35 being of course outside of the pitclrcircle of drum 11. The cross-section of the completed vane The groove in drum 11 corresponds in cross-section to the two surfaces 32, so that when any cross-section of the vane lies with its axis inline with the centers of the drums it will-fit the groove closely, and as the two drums are rotated they will be advanced with equal angular velocities, the tip of the vaneremaining in contactwith one of the surfaces 32 of the groove, while the opposite point 35 of the groove remains in contact;with the surface 33 of the vane. I i Y g'f In operation the intermeshing of the vanes 10 with, the grooves 11 produces a spiral wedge-shaped chamber, into the rear endof which is introduced the motive fluid, which if it be steam or an explosive gas acts both by impact and expansion upon the walls or arms of the wedge and forces them apart, thus causing arotation of the two drums in oppositedirections and causing the wedgeshaped chamber tospread and its closed point to'advance parallel with the axes of the d rn ms until it reaches the farther end of the casing and the motive fluid discharged through the exhaust. By this time another Vane and coacting groove have come opposite the inlet-' p at and the motive fluid is admitted into the new wedge-shaped chamber formed thereby. The operation is continuous and automatic, and where steam is used the impact pressure and expansion areiutilized.

There is of'course considerable'end thrust upon the drums, and in order to balance this a construction like that shown in Fig.8 may be provided. *Inthis figure drums 36 and 37 are provided Withicoacting vanes and. grooves 36' and 37'." Secured-to the shafts of these drums are similar drums 38 and 39,.provided with vanes and grooves 38' and 30, the inclination of which, however, is opposite to that of the vanes and grooves of the other drums.

In this case the exha'ust-ports 40 may be formed in the central partition.

I claim as my invention 1. In a rotary engine, the combination with I arranged that its ports may be brought alternately into register with the corresponding inlet-port and exhaust-port of the casin g, a second valve-plate mounted adjacent the first valve-plate and provided with an inlet-port adapted to be brought into register with the inlet-port of the first plate, a suitable chamber inclosing said plates and having inlet and exhaust passages leading to and 'frernthe same, and means for shifting said plal.es,substantially as and for the purpose set forth.

2. The combination of a'rotative drum,having a spiral vane with crown curves consisting of a pair of oppositelyextendinginverted' epicycloidal curves traced by a point outside of the pitch-circle, when the pitch-circles of the two drums are equal and the vane-drum rolls upon the other-,and inverted epicycloidal base curves traced by the point of intersection of the crown curve with the periphery of the groove-drum when said drum rolls upon the first drum; and a groove-drum provided with a spiral groove the contour of said Y groove being a pair of diverging inverted epicycloidal curves corresponding to the curve of the crown of the vane.

NEWELL H. MOTSINGER.

Witnesses:

' ARTHUR M. Hoop,

. BERTHA M. BALLABU. 

